DE102017001337A1 - bridge construction - Google Patents

Abstract

The invention relates to a bridge structure (10), with a first bridge (11) and with an FRP structure (16) in a second bridge (15) above the first bridge (11).

Description

The invention relates to a bridge structure and a method for producing a bridge structure.

Bridges have a long but limited lifespan. Steel, concrete and other materials corrode or age and thereby lose their strength. The bridges must then be replaced. A complex renovation or demolition with subsequent new construction are usual.

Bridge structures with fiber composite plastics (hereinafter referred to as FVK) are already known. Bridges made with FRP are lighter and more filigree than bridges with corresponding reinforced concrete structures.

The object of the invention is to provide a bridge structure as a replacement for a bridge constructed in conventional construction. In particular, the bridge structure should be produced in a short time.

To solve the problem, the bridge structure according to the invention has the features of claim 1. In particular, a first bridge and above the same a second bridge are provided, wherein the second bridge has a FRP structure. The FVK structure is understood to mean a structure which contains FRP or which consists only or predominantly of FRP, optionally in addition to other materials. Other materials may be in particular plastic, steel, concrete, wood or foams. The FRP structure may additionally be provided with a roadway or already contain it.

The second bridge with the FRP structure may rest on the first bridge or otherwise be disposed or stored above it. The first bridge is a bridge in need of repair or renewal, while after the second bridge has been installed, the latter is primarily used. Previous work on the first bridge is not required. Accordingly, the bridge structure can be completed with the second bridge. Since the second bridge with the FRP structure is relatively light in relation to a first bridge constructed in conventional construction, the loads of the second bridge can be well distributed and accommodated. Also, the first bridge can then be rehabilitated or dismantled.

Advantageously, the second bridge extends in an upright plane common to the first bridge, in particular just above the first bridge. As a result, the space required for the bridge structure is minimized overall.

According to another aspect of the invention, the FRP structure of the second bridge is cantilevered, at least above one or more cantilevered areas of the first bridge. Unsupported in this sense means that the FRP structure rests or is supported only at their ends. Intended is the self-supporting overvoltage of the first bridge as a whole, up to its foundations and / or at least a region from one foundation to the next foundation of the first bridge. If the first bridge has more than two successive foundations in its longitudinal direction, ie at least one intermediate foundation, the FRP structure can also be subdivided or supported, corresponding to the number of foundations of the first bridge.

Advantageously, the FRP structure of the second bridge completely covers the first bridge, but at least up to end-side foundations of the first bridge. As foundations in particular support elements are understood, on which the first bridge rests or which support the first bridge from below. The foundations preferably rest on or in a subsoil.

According to a further aspect of the invention, the second bridge is supported at least indirectly on foundations of the first bridge, in particular on end-side foundations of the first bridge. This makes it possible to dispense with own foundations for the second bridge. Due to the FRP structure, the second bridge is significantly lighter than the first bridge. In most cases, the foundations of the first bridge are dimensioned so that the second bridge can be additionally supported.

According to a further idea of the invention, the second bridge is supported at least indirectly on foundations, which are arranged in particular laterally next to foundations of the first bridge. As a result, the foundations of the first bridge are not additionally loaded. It is easier to dismantle the first bridge. Also, the second bridge itself can be bigger and heavier.

According to a further aspect of the invention, the second bridge on Auffahrrampen, which rest in particular on roads of the first bridge, are supported there and / or extend above it. As lanes of the first bridge also passable surfaces are understood, which connect to the first bridge. The roadways may be supported or embedded by foundations of the first bridge or by their own foundations or otherwise.

Advantageously, the FRP structure contains carbon fibers as reinforcing material. When using carbon fibers is a CFRP structure (carbon fiber reinforced Plastic). The carbon fiber makes the FRP structure even lighter and stiffer. Possible is the realization of self-supporting bridges with greater length and / or lesser height.

The invention also provides a method for producing a bridge structure. The features of the method are listed in claim 9. In particular, it is assumed that a first bridge with foundations. A second bridge with FRP structure is deposited at least partially, indirectly or directly, on the foundations of the first bridge or on its own foundations, such that the second bridge at least partially spans the first bridge. Ramps for the second bridge can be stored on lanes of the first bridge.

Finally, the subject of the invention is also a method having the features of claim 10, namely for the rehabilitation or the dismantling of a first bridge.

• 1 eine Seitenansicht eines Brückenbauwerks,
• 2 eine Draufsicht auf eine andere Ausführungsform eines Brückenbauwerks.

Further features of the invention will become apparent from the description, moreover, and from the claims. Advantageous embodiments of the invention will be explained in more detail with reference to figures. Show it:

• 1 a side view of a bridge structure,
• 2 a plan view of another embodiment of a bridge structure.

A bridge structure 10 according to 1 a first bridge 11 on which end in each case on foundations 12 . 13 is stored. The foundations 12 . 13 stand on a ground 14 or are partially embedded in the same.

Above the first bridge 11 is a second bridge 15 with a FVK structure 16 intended. The FVK structure 16 spans the first bridge 11 self-supporting.

The first bridge 11 has a bridge carriageway 17 and connecting lanes 18 . 19 on. The latter are on the foundations 12 . 13 open and close with the smallest possible gaps 20 . 21 to the bridge carriageway 17 at.

The second bridge 15 (with bridging track not shown) is with ramps 22 . 23 provided, which on the connecting lanes 18 . 19 rest or lead to this. end 24 . 25 the second bridge 15 lie on the foundations 12 , 13 or on the connecting lanes 18 . 19 on, in particular above the foundations 12 . 13 , This burdened the second bridge 15 not the first bridge 11 themselves, but at most their foundations 12 . 13 or the connecting lanes 18 . 19 , bridge bearings 26 . 27 the first bridge 11 do not carry any additional loads here.

The FRP structure is preferably a CFRP structure, ie with carbon fiber reinforced plastic or with carbon fibers as a reinforcing material in conjunction with concrete, steel, wood or other materials.

The first bridge 11 is a bridge to be renovated. Instead of expensive repairs or as a replacement for a demolition of the first bridge 11 becomes the second bridge 15 set over it. The used FVK structure 16 can be completely pre-assembled and delivered depending on the size of the second bridge or can be created on site. For example, the FRP structure may be outside the first bridge 11 finished and then on the foundations 12 . 13 be lifted or pushed. The roadway, not shown, is integrated or subsequently applied, in particular after discontinuation of the FRP structure 16 on the first bridge.

The first bridge 11 can under the second bridge 15 remain or be dismantled or rehabilitated without time.

2 shows an embodiment in which the second bridge 15 own foundations beside the foundations (not shown here) of the first bridge 11 has four foundations 28 . 29 . 30 . 31 , The first bridge 11 gets completely from the second bridge 15 covered. Additionally, the second bridge points 15 here four lateral bearings 32 . 33 . 34 . 35 lying on the four foundations. Alternatively, the second bridge can also be made wider overall, beyond the foundations 28 , 29, 30, 31.

LIST OF REFERENCE NUMBERS

10

bridge construction

11

First bridge

12

foundation

13

foundation

14

underground

15

second bridge

16

FRP structure

17

bridge deck

18

connecting guideway

19

connecting guideway

20

gap

21

gap

22

ramp

23

ramp

24

end

25

end

26

bridge bearings

27

bridge bearings

28

foundation

29

foundation

30

foundation

31

foundation

32

lateral bearing

33

lateral bearing

34

lateral bearing

35

lateral bearing

Claims (11)

Bridge structure (10), with a first bridge (11) and with an FRP structure (16) in a second bridge (15) above the first bridge (11). Bridge structure after Claim 1 , characterized in that the second bridge (15) extends in an upright plane common to the first bridge (11). Bridge structure after Claim 1 or 2 , characterized in that the FRP structure (16) is cantilevered, at least above one or more cantilevered areas of the first bridge (11). Bridge structure after Claim 1 or one of the further claims, characterized in that the FRP structure (16) completely spans the first bridge (11), but at least up to end-side foundations of the first bridge (11). Bridge structure after Claim 1 or one of the further claims, characterized in that the second bridge (15) at least indirectly on foundations (12, 13) of the first bridge (11) is supported, in particular on end-side foundations (12, 13) of the first bridge (11). Bridge structure after Claim 1 or one of the further claims, characterized in that the second bridge (15) at least indirectly on foundations (28, 29, 30, 31) is supported, in particular laterally next to foundations (12, 13) of the first bridge (11) are arranged , Bridge structure after Claim 1 or one of the further claims, characterized in that the second bridge (15) Auffahrrampen (22, 23) which rest in particular on roadways (17, 18, 19) of the first bridge (11) are supported there and / or above the same. Bridge structure after Claim 1 or one of the further claims, characterized in that the FRP structure (16) contains carbon fibers as reinforcing material. Bridge structure after Claim 1 or one of the further claims, characterized in that the FRP structure (16) is installed as a preassembled support structure. Method for producing a bridge structure (10), starting from a first bridge (11) with foundations (12, 13), characterized in that a second bridge (15) with FRP structure (16) at least partially, indirectly or directly on the foundations (12, 13) of the first bridge (11) or on its own foundations (28, 29, 30, 31) is stored, such that the second bridge (15) at least partially spans the first bridge (11). Method for repairing or dismantling a first bridge (11), characterized in that above the first bridge (11) a second bridge (15) with in particular cantilevered FRP structure (16) is erected, and in that subsequently the first bridge (11 ) is rehabilitated or dismantled.

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